import React, { Component } from "react";
import myaxios from "../../utils/myaxios";
import { NavBar, Icon, Carousel, Toast } from "antd-mobile";
import "./GoodDetail.scss";

export default class GoodDetail extends Component {
  state = {
    goodInfo: {},
    imgHeight: 250,
    /*1 设置轮播图是否显示 默认情况不显示 */
    showSwiper: false,
    showCollect: false//是否收藏
  }
  componentDidMount() {
    let { goods_id } = this.props.match.params;
    myaxios.get('/goods/detail', {
      params: {
        goods_id
      }
    }).then(res => {
      console.log(res);
      /* 3. 当请求的轮播图回来的时候   showSwiper true*/
      this.setState({
        goodInfo: res,
        showSwiper: true
      })
      //初次进入商品的时候判断是否被收藏
      let collections_str = localStorage.getItem('collections')
      let collections = JSON.parse(collections_str || '[]')
      // 对收藏进行循环遍历
      // 判断是否在收藏中
      let index = collections.findIndex(v => {
        return v.goods_id === parseInt(goods_id)?true:false
      })
      if (index !== -1) {
        this.setState({
          showCollect: true
        })
      }
    }).catch(err => console.log(err))
  }
  // 收藏的功能
  handleCollect = (params) => {
    // collections 代表的是收藏的数据 数组
    let collections_str = localStorage.getItem('collections')
    let collections = JSON.parse(collections_str || '[]')
    // 对收藏进行循环遍历
    // 判断是否在收藏中
    let index = collections.findIndex(v => {
      return v.goods_id === this.state.goodInfo.goods_id?true:false
    })
    if (index !== -1) {
      //代表之前收藏过
      collections.splice(index, 1)
      Toast.info('取消收藏成功', 1)
      this.setState({
        showCollect: false
      })
    } else {
      Toast.info('收藏成功！', 1)
      collections.push(this.state.goodInfo)
      this.setState({
        showCollect: true
      })
    }
    localStorage.setItem('collections', JSON.stringify(collections))
  }
  //添加至购物车中
  addToCart = (params) => {
    //首先从本地缓存获取购物车数据
    let carts_str = localStorage.getItem('carts')
    let carts = JSON.parse(carts_str||'[]')
    //获取goods_id
    let {goods_id} = this.props.match.params
    let index = carts.findIndex(v=>{
      return v.goods_id === parseInt(goods_id)?true:false
    })
    //index === -1 代表本地缓存找不到
    if(index === -1){
      let goods_info = this.state.goodInfo
      goods_info.num = 1; // 第一次添加 数量是1
      goods_info.checked = true; // 在购物车中默认被选中
      carts.push(goods_info)
    }else{
      carts[index].num ++
    }
    Toast.info('加入购物车成功',1)
    localStorage.setItem('carts',JSON.stringify(carts))
  }
  //跳转至购物车
  gotoCart = (params) => {
    this.props.history.push('/cart')
  }
  // 立即购买
  pay = (params) => {
    this.props.history.push("/pay");
  }
  render() {
    return (
      <div className='yg-detail'>
        <NavBar
          className="yg-detail-nav"
          mode='light'
          icon={<Icon type='left' />}
          onLeftClick={() => window.history.go(-1)}
        >
          商品详情
        </NavBar>
        {/* 首页轮播图开始 */}
        <div className="yg-detail-swiper">
          {/* 2. showSwiper和轮播图绑定 */}
          {this.state.showSwiper && (
            <Carousel infinite autoplay={true}>
              {this.state.goodInfo.pics && this.state.goodInfo.pics.map(v => {
                return <div
                  key={v.goods_id}
                  className='imageWrapper'
                  style={{
                    display: 'inline-block',
                    width: '100%',
                    height: this.state.imgHeight
                  }}
                >
                  <img src={v.pics_mid}
                    alt=''
                    style={{ width: '100%', verticalAlign: 'top' }}
                    onLoad={() => {
                      window.dispatchEvent(new Event("resize"));
                      this.setState({ imgHeight: "auto" });
                    }}
                  ></img>
                </div>
              })}
            </Carousel>
          )}
        </div>
        {/* 首页轮播图结束 */}
        {/* 价格和分享区域开始 */}
        <div className="yg-detail-price">
          <div className="price-left">
            <span className="title1">￥{this.state.goodInfo.goods_price}</span>
          </div>
          <div className="price-right">
            <i className='iconfont icon-fenxiang'></i>
            <i onClick={this.handleCollect} className={this.state.showCollect ? 'iconfont icon-shoucang active' : 'iconfont icon-shoucang'}></i>
          </div>
        </div>
        <div className='yg-detail-title'>
          {this.state.goodInfo.goods_name}
        </div>
        {/* 价格和分享区域结束 */}
        {/* 图文详情开始 */}
        <div className="yg-detail-tuwen">
          <div className="tuwen-title">
            图文详情
          </div>
          <div className="tuwen-content" dangerouslySetInnerHTML={{ __html: this.state.goodInfo.goods_introduce }}>
          </div>
        </div>
        {/* 图文详情结束 */}
        {/* 底部的工具栏开始 */}
        <div className="yg-detail-bottom">
          <div className='bottom-contact'>
            <i className="iconfont icon-lianxikefu"></i>
            <div className="title">联系客服</div>
          </div>
          <div className="bottom-cart" onClick={this.gotoCart}>
            <i className="iconfont icon-gouwuche"></i>
            <div className="title">购物车</div>
          </div>
          <div className="bottom-addToCart" onClick={this.addToCart}>
            <span className="title1">加入购物车</span>
          </div>
          <div className="bottom-buy" onClick={this.pay}>
            <span className="title2">立即购买</span>
          </div>
        </div>
        {/* 底部的工具栏结束 */}
      </div>
    );
  }
}
